A History of English Literature (Palgrave Macmillan, 2000), 2nd edition 2007

Medievalism: The Middle Ages in Modern England (Yale University Press, 2007)

The Earliest English Poems (Harmondsworth: Penguin Classics, 1966), University of California facing-text edition, 1970; New edition, The First Poems in English, Penguin 2008

Beowulf: A Verse Translation with introduction and notes (Harmondsworth: Penguin Classics, 1973. Revised edition, 2001)

The Canterbury Tales: The First Fragment. A glossed text. (London: Penguin, 1996)

Sons of Ezra (co-edited with James McGonigal; Rodopi, 1995)

The Poetic Achievement of Ezra Pound (London: Faber, 1979) University of California Press, 1980. Revised edition, Edinburgh University Press, 1998

A History of Old English Literature (London: Macmillan; New York: Schocken, 1983, 1986) (Third revised edition, Broadview, Canada, 2001)

Old English Riddles from the Exeter Book. Verse translations. (London: Anvil Press Poetry, 1980, 1982, 1984. Revised edition, 2007)

Twelve Poems (London: Agenda Editions, 1978)

Beowulf: A Glossed Text (Penguin English Poets, 1995. Revised edition, 2000)

The Canterbury Tales: The Illustrated Prologue (London: Scala Books, 1996, 1998)

The Macmillan Anthologies of English Literature (5 volumes, joint General Editor with A N Jeffares; Basingstoke: Macmillan, 1989). Volume editor of Vol 1, The Middle Ages, with Felicity Riddy